|Publication number||US4218204 A|
|Application number||US 06/004,553|
|Publication date||Aug 19, 1980|
|Filing date||Jan 18, 1979|
|Priority date||Jan 19, 1978|
|Also published as||CA1109219A, CA1109219A1, DE2902143A1|
|Publication number||004553, 06004553, US 4218204 A, US 4218204A, US-A-4218204, US4218204 A, US4218204A|
|Inventors||Frederick H. Edwards|
|Original Assignee||Vinyl Clad Proprietary Limited|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (4), Referenced by (17), Classifications (13), Legal Events (2)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This invention relates to the labelling of moulded products, particularly injection moulded plastic products.
The time and labour content involved in applying labels to moulded plastic products subsequent to the moulding step is quite high. It has been proposed previously to insert labels into the mould and then to inject the plastic and mould the product onto the label. Australian Pat. No. 274,565 relates to a method of inserting a film into a mould cavity and injecting a molten thermoplastic into the cavity whereby the film which contains printed matter is fused to the moulded product.
Australian Pat. Nos. 448,053 and 430,449 relate to mould labelling where the label is applied to a blow moulded product during the blow moulding operation. The label applicator moves the label toward and onto the expanding blow moulded product. The apparatus of these patents is not particularly suitable or practical for injection moulding.
Australian Patent Specification No. 44776/68 describes an apparatus for placing a label into a mould cavity during the sequence of mould operations when the mould parts are open. An apparatus of this kind requires precise sequential movements of the label inserting arm and the mould parts otherwise serious damage to the mould and the label inserting equipment can occur. Further, the moulding time for each product tends to be lengthened and this reduces output volumes for the moulding machines.
It is an object of this invention to provide means for label application during the moulding operation which overcomes some of the short comings of the prior art.
To this end, the present invention provides in an injection moulding machine, the improvement comprising a movable mould part having a plurality of faces adapted to receive and retain a label, said movable mould part being movable from a position in which a label is placed onto one of said plurality of faces to a position where said one face forms part of a wall of the mould cavity of said injection moulding machine. Preferably, the movable mould part may either be rotatable or reciprocal. The movement of the movable mould part is preferably timed to occur in sequence with the opening sequence of the mould during which the moulded product is released.
The label preferably has its printed surface against the movable mould face so that the injected plastic covers the reverse surface of the mould. Although it is not preferred, the injection of the plastic can be from the movable mould face through a central hole in the label and into the mould cavity.
There will now be described two preferred embodiments of the present invention.
FIG. 1 is a sectional view of one embodiment of this invention wherein the die elements are separated.
FIG. 2 is a similar sectional view to FIG. 1, wherein the die elements are in their closed position.
FIG. 3 is a sectional view of a second embodiment of the invention, wherein the die elements are shown apart; and
FIG. 4 is a similar view to FIG. 3 showing the die elements together.
Referring now to FIGS. 1 and 2, the assembly is connected to an injection moulding machine (not shown) which extends behind die plate 6. The die cavity 7 is in the form of a container lid, which lid 8 is shown in FIG. 1. The die itself is composed of die plate 6 which is attached to the injection moulding machine, die plate 9 and rotary core 10. The rotary core 10 has four faces 12 which form a section of the die wall and which are adapted to carry a label 13 which is applied to the surface of lid 8.
FIG. 2 shows the label applicator 15 in position on a face 12 of the rotary core 10 transferring a label 13 to the face during the injection step of the moulding operation. Any suitable form of label applicator can be used. Ideally, the sequence of movements of the label applicator are dictated by the movements of the die elements or the timing of the injection machine.
The sequence of steps are:
(1) Label in closed die cavity and injection of thermoplastic is taking place while at same time label applicator places label onto the next successive rotary face.
(2) Die plates 6 and 9 move apart subsequent to label applicator 15 moving away from the face of rotary core 10. The initial movement away of label applicator 15 ensures that it is well clear of the face of the rotary core 10.
(3) Rotary core 10 rotates 90° to move the label 13 arcuately and laterally into alignment with die plates 6 and 9 in the open die position. During this movement, label applicator 15 moves adjacent the label hopper to pick up another label.
(4) The die plates 6 and 9 come together with rotary core 10 and label applicator 15 moves back to contact the next successive face 12 of rotary core 10.
The sequence then continues.
To ensure that the sequence of operations is correctly followed, the movement of the rotary core is actuated by the opening and closing of the die plates and the movement of the die plates also actuates the sequential movements of the label applicator.
The second embodiment of this invention is illustrated in FIGS. 3 and 4.
The injection moulding machine (not shown) is attached to die plate 21 which with die plate 22 and the die faces 23 and 23A of sliding core 24 forms the die cavity 25. The die cavity 25 is once again used for the formation of a container lid 26 and the label 27 is applied to the lid from die faces 23 and 23A.
The sliding core 24 reciprocates between a first position as shown in FIG. 3 and a second position as shown in FIG. 4. Two label applicators 30 can be used to apply labels from the hoppers 29 to die faces 23 and 23A of the two die parts on the sliding core 24.
The sequence of operating steps for the embodiment of FIGS. 3 and 4 are:
(1) The label is in the closed die cavity 25 and injection of thermoplastic is completed when the first label applicator 30 (shown in FIG. 4) transfers a label to face 23A of the second die face of sliding core 24. The transfer of the label is achieved by forming an electrostatic charge on the label as in the previously described embodiment.
(2) Die plates 21 and 22 move apart and away from sliding core 24 and the label applicator moves laterally away from die face 23A.
(3) Sliding core 24 then moves laterally to bring face 23A with the label 27 into alignment with die plates 21 and 22. Simultaneously, the label applicator (not shown) for the die face 23 of sliding core 24, picks up a label in readiness for face 23, which has moved into position for receiving a label.
(4) Die plates 21 and 22 close with the die face 23A carrying the label to commence the next injection moulding sequence while the other die face 23 of sliding core 24 receives a label.
As with the first embodiment, the movement of sliding core 24 is actuated by the injection and separation sequences of the injection moulding machine and these movements similarly actuate the movement of the label applicator.
In both embodiments, the label can easily be introduced into the die cavity without slowing down the injection moulding sequence or increasing the probability of damage to the die. Because the label applicator does not enter the die cavity, there is less likelihood of accidents occurring.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3463845 *||Apr 6, 1967||Aug 26, 1969||Union Camp Corp||Injection molding apparatus for making composite paper-plastic lids and method|
|US3555609 *||Oct 31, 1967||Jan 19, 1971||Bata Shoe Co||Injection molding apparatus|
|US3557406 *||Jul 16, 1968||Jan 26, 1971||Lindstroem Gmbh Carl||Apparatus for the automatic production of gramophone records|
|US3826600 *||Jun 30, 1972||Jul 30, 1974||Emi Ltd||Apparatus for the production of gramophone records with labels attached thereto|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US4708630 *||May 19, 1986||Nov 24, 1987||The Procter & Gamble Company||Apparatus for labeling blow-molded articles by placing label directly on the parison|
|US5198242 *||Dec 10, 1991||Mar 30, 1993||American Maplan Corporation||Rotary turret embosser|
|US6718664||Jan 3, 2002||Apr 13, 2004||Williams Industries||Container having image-carrying sheet and method of manufacturing such container|
|US7140857 *||Dec 20, 2002||Nov 28, 2006||Iml By Idesign Llc||Label ledge for injection molded containers|
|US7850893||Dec 1, 2006||Dec 14, 2010||Rexam Healthcare Packaging Inc.||Molded plastic container and preform having insert-molded RFID tag|
|US7875227||Dec 1, 2006||Jan 25, 2011||Rexam Healthcare Packaging Inc.||Molded plastic container and preform having insert-molded RFID tag|
|US7922961 *||Apr 12, 2011||Rexam Healthcare Packaging Inc.||Molded plastic container having insert-molded insert and method of manufacture|
|US7951322||Jun 13, 2006||May 31, 2011||Electroform Company||Method and apparatus for molding and assembling plural-part plastic assemblies|
|US8113820||Feb 24, 2011||Feb 14, 2012||Electroform Company, Inc.||Method and apparatus for molding and assembling plural-part plastic assemblies|
|US20030155262 *||Dec 20, 2002||Aug 21, 2003||Graham Brian K.||Label ledge for injection molded containers|
|US20040099990 *||Nov 21, 2003||May 27, 2004||Williams Bruce A.||Method of manufacturing container having image-carrying sheet|
|US20060191174 *||Apr 26, 2006||Aug 31, 2006||Iml By Idesign||Label ledge for injection molded containers|
|US20070245604 *||Apr 26, 2006||Oct 25, 2007||Iml By Idesign||Label Ledge for Injection Molded Containers|
|US20070284784 *||Jun 13, 2006||Dec 13, 2007||Electroform Company, Inc.||Method and apparatus for molding and assembling plural-part plastic assemblies|
|US20080110774 *||Nov 10, 2006||May 15, 2008||Chisholm Brian J||Molded plastic container having insert-molded RFID tag and method of manufacture|
|US20080131629 *||Dec 1, 2006||Jun 5, 2008||Owens-Illinois Healthcare Packaging Inc.||Molded plastic container and preform having insert-molded RFID tag|
|US20110206796 *||Aug 25, 2011||Electroform Company, Inc.||Method and Apparatus for Molding and Assembling Plural-Part Plastic Assemblies|
|U.S. Classification||425/129.1, 425/190, 425/128, 425/185|
|International Classification||B29C45/04, B29C45/14|
|Cooperative Classification||B29C45/045, B29C2045/14106, B29C45/14008, B29C45/0416|
|European Classification||B29C45/14B, B29C45/04B2, B29C45/04D2|
|Jul 25, 1994||AS||Assignment|
Owner name: PACIFIC WORLD PACKAGING (AUSTRALIA) PTY. LTD., AUS
Free format text: CHANGE OF NAME;ASSIGNOR:VINYL CLAD PROPRIETARY LIMITED;REEL/FRAME:007074/0205
Effective date: 19930415
|Mar 23, 1998||AS||Assignment|
Owner name: POLARCUP (AUSTRALIA) LIMITED, AUSTRALIA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PACIFIC WORLD PACKAGING (AUSTRALIA) PTY LTD;REEL/FRAME:009103/0646
Effective date: 19970930